I took a look at the innards of the install process, as I guess it needs to be updated.
As to what it looks to offer, certainly compcache and overclocking. And in looking at the list of modules that get loaded there are gonna be a ton of goodies for folks. Not sure if the average/regular user will see a bucketload of benefits other than the main goodness (which is way worth the price of admission), but it looks like a lot of features to deal with advanced connectivity, at least. Prime has been a very busy boy.
Also what prime is doing in the install is deleting any existing 20overclock and/or any 99overclock scripts that you might have on your phone. Those of us using the reprimed method will have a 20overclock, and if you have a custom one, back it up. Not likley many will have a 99overclock file, but if you do for any reason, that one too needs to be backed up before flashing.
And Prime did not specifically mention whether this is backwards compatible on the older nightlies, prior to about 41 nightly or Winners version 41ish, you may not want to try anything certainly until the fix is in from prime, and possibly until he confirms the functioning on older nightlies.
Craig